Bagasse-furnace.



Np. 856,011! PATENTED JUNE 4, 1907.

F. P. WILLBMS. BAGASSB FURNAGB.

APPLICATION FILED 001,31, 1906.

2 SHEETS-SHEET 1.

W/TNESSES lNl/ENTOR ATTORNEYS 'UNITED STATES PATENT OFFICE.

FRANS F. WILLEMS, or DELANGGOE, JAVA.

BAGASSE-FURNACE.

Specification of Letters Patent.

Patented June 4, 1907.

Application filed Qctober 31, 1906. Serial No. 3%].434.

from the juice-extracting machinery.

The object of the invention is to provide a furnace in which the ba asse may be dried before reaching the grate bars, and may thus be utilized more economically as a fuel.

The bag'asse as it comes from the.juice extracting machinery. is of great bulk and contains a very lar e percenta e of moisture,

which moisture is t oroughly ri'ven ofi after the baga'sse enters the furnace but before it reaches ,the main ate bars.

Reference is to e had to the accompanying drawings forming a partof this specification, in which similar characters of reference indicate corresponding parts in all the figures, in which Figure 1 is a longitudinal section of a furnace provided with my im rpvements, and on the line 1-1 of Fi 2; 2 is a transverse section, the leftand portion being on a line outside of the furnace, and the right-' hand portion being on the line 22 of Fig.

Fig. 3 is a longitudinal section of the aux1l iary or drying furnace; Fig. 4 is a plan view of said auxiliary or drying furnace; and Fig. 15?1 is a transverse section on the line 55 of my im rovedfurnace there is provided a main com ustionschamber 1, and a brid e wall 2 spaced from the upper arches 3 of t e furnace, whereby a flue 3 is formed leading to the bdiler 3". Below the combustion chamber are located two sets of grate bars 4 and 5, which grate bars are set at an angle to each other, the lower grate bars 4 being nearly horizontal, while the upper grate bars 5 are at an obtuse angle thereto and spaced in a parabolic curve. The lower grate bars are secured to a frame 4 carried by two horizontal bars 4", which latter may be moved up and down within guides 4, and held in p ace by means of blocks 4 of varyin size which may be inserted within the gui es 4 and beneath the lower edges of the bars 4 The grate bars 4 preferably extend longitudinally of the furnace, while the grate bars 5 are arranged transversely thereto. These latter-bars are, as above stated, arranged in a lgaraboliccurve and securedv to a frame 6, w 'ch frame is provided withextensions 7 pivoted to a shaft 8 carried .by the front wall of the furnace adjacefirtthe opening thereto. The lower end'of the frame 6 rests upon the lower grate bars 4,'and as the latter are raised or lowered, the inclination of the former is varied. When the grate bars 4 are in their lowermost position, the grate bars 5 and supporting frame 6 occupy the osition shown in dotted lines in Fig. 1 The mclined grate may be moved by means of proper position ma be en orted by means .of a bar 6 inserted within gi iides 6 upon the sidewalls of the furnace.

Adjacent the u per end of the grate bars 5 is located the fue inlet passage 9, the size of said inlet being controlled by a loose plate 10 sup orted therein. Adjacent the lower end ofit e inlet opening is a guide plate 11 extending overthe shaft 8-and the end of the frame 6, whereby the fuel entering the inlet passage 9 is directed onto the up er ends of the grate bars 5. The ba asse is ed by hand or automatically into t e let opening 9 and as it falls upon the grate liars 5, its passage down said bars is retarded, due to the fact that these bar's extend transversely of the furnace givin a step-ladder efiect. The grate bars levers, not shown, and when placed in the are p aced at such an angle that the bagasse may move slightly downward to the lower grate, and means are provided whereby the agasse may be thoroughl dried while at the upper end of this grate nd'be in a condition to be rapidly burned as it reaches the lower end of the grate and the second grate below. This means comprises an auxiliary or drying furnace 12 arranged directly below the upper grate. bars 5, and having its front "side 12 cut away so as not to interfere with the free movement of said grate bars. The rear wall 12 of said furnace is formed solid to prevent the entrance of coldair from the outside, while the lower wall of the furnace I is provided with suitable grate bars 12 whereby the cold air which enters the furnace proper may pass to the auxiliary furnace and support{ the-"combustion therein,

which furnace serves. to dry the bagasse upon the upper grate bars 5, inasmuch as all of the products ofcombustion from the auxiliary furnace must pass through between said bars.

The drying furnace is preferably of less Width than the main furnace, and is centrally located as indicated in Fig. 2. In or ,der to support the furnace, I provide suitable bars 13 pivoted to the frame 6, and having -their outer ends supported upon a bar 14 having its ends resting in guides 15 upon the Walls of the furnace. The air for supporting the combustion of the fuel in the auxiliary furnace, as Well as upon the main grate bars,

Having thus described my invention, I

claim as new and desire to secure by Letters Patent:

1. An apparatus of the class described,

comprising an inclined grate, a second -substantially horizontal grate, means for ya ing the positionof one of said grates and an auxiliary or drying .fiurnacebeneath the upper end of the inclined grate.

f 2. An apparatus 'of the class described,- comprising a ate, a second grate havingv one'end thereo pivotally supported and havingu the opposite'end resting upon the first mentionedgi'ate, and means beneath thelup- 5 per end of the first mentioned grate for drymg the material thereon.

3. In an ap aratus of the class described, a grate, an inc ined curved grate having one end thereof adjacent the first mentioned grate and at an angle thereto, means beneath the upper end ofthe curved grate for drying the material thereon, and means for varying the position of'both grates.

4. In an apparatus of the class described, a substantially horizontal grate, a curved inclined grate having the up 'er end thereof pivoted and the lower end t ereofadjacent the first mentioned grate, and a furnace beneath the upper end of the curved grate for drying the material thereon.

5. u an apparatus of the class described, a grate, .means for varying the elevation tioned grate, means for varying the'positio'n of said inclined grate, and means 'eneath the upper end of said inclined grate for drying the material thereon.-

6.;In' an apparatus of the classd'escribed,

ondcurved inclined grate having one end thereof pivoted and the bars thereof arranged transversely in a parabolic curve, means be'neaththe upper end of saidinclined grate for drying the material thereon,'and means'for admitting material to the upper end of said last mentioned grate.

In testimony whereof I afiix my signature inpresenceoftwowitnesses.

' F. F. WILLEMS;

'Witn'esses;

thereof, a second inclined grate having oneend thereof pivoted. and the opposite end thereof terminating adjacent thefirstmen'w a grate having longitudinal grate bars, a sec- 

